Angle-cock device



c. c. FARMERQ ANGLE COCK DEVICE.

APPLICATION FILED OCT: 15, 1919.

1,409,691 Patented Mar. 14, 1922.

INVENTOR ATTORNEY UNITED STATES PATENT OFFICE.

CLYDE C. PARKER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIR BRAKE COMPANY, OF WILMERDING, PENNSYLVANIA. A CORPORATION OF PENNSYLVANIA.

AN GLE-COCK DEVICE.

Application filed October 15, 1919. Serial No. 330,788.

all whom it may concern Be it known that I, CLYDE C. FARMER, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Angle-Cock Devices, of which the following is a specification.

This invention relates to fluid pressure particularly to a train pipe with the result that the engineer cannot then a control the brakes on the train, so that there is danger of wrecks and accidents.

lit has heretofore been proposed to provide an angle cock with'a vent port adapted to vent fluid from the brake pipe when turned to closed position so that the brakes will be automatically applied in such case and thus warn the engineer that an angle cock has been closed.

Trouble has been experienced, however, with the. above arrangement, due to leakage around the cock key through the vent port and due to entrance of dirt, tending to stop up the vent port and also work its way into the cock key.

The principal object of my invention is to provide means for overcoming the above difliculties.

In the accompanying drawing, Fig. 1 is a vertical longitudinal section of an angle cock embodying my invention; Fig. 2 a section on the line 2-2 of Fig. 1; Fig. 3 a plan view of the angle cock; and Fig. 4 a view of the angle cock handle.

As shown in the'drawing, the angle cock may be' of the usual construction comprising a cock body 1 having therein a tapered cock key 2, adapted to be operated by handle 13 and having an open position in which the port 4 establishes communication through the cock conduit 5 and a position in which said connection is closed.

In order to provide for venting fluid from the train pipe, one or more jioles 6 are provided in the key 2, so positioned as to establish communication from the conduit 5 to the port 4, in the closed position of the cock. A vent port 7 is drilled through the side of the cock body 1 and connects port 4 with a chamber 8, formed in the cock body, when the cock is in its closed position.

Chamber 8 contains a poppet valve 9 for controlling connection from chamber 8 to an atmospheric exhaust port 10 and is prov1ded with a stem 11 adapted to be acted upon by a cam surface 12 provided on the handle 3, and so arranged that when the handle is turned to its closed position, the

camsurface 12 will act to press down the stem 11 and thus open the valve 9.

A spring 13 tends to hold the valve 9 seated and it will be evident that in the normal open position of the cock, as shown in Fig. 2, the valve 9 will be seated by the spring 13 and leakage through the vent port 7 will be. prevented.

When the cock key 2 is turned to its closed position, the cam surface 12 acts to depress the stem 11 and open the valve, so that fluid will be vented from the conduit 5, through ports 6, port 4, vent port 7, past valve 9, toexhaust port 10, so as to cause an application of the brakes and thus give warning that an angle cock has been closed.

While a single port 6 might be employed, it is preferabe to provide a plurality, so as to ensure that the full venting capacity of the port? will be secured.

In order to prevent collapsing of thekey 4 due to unbalanced pressures, a port 14 may be provided for admitting fluid from. the conduit 5 to the large end of the key 2, so that the fluid pressure in the conduit acts on the key and tends to hold same in its seated position.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a train pipe and an angle cock for controlling communication through the train pipe and having a vent port for venting fluid from the train pipe in the closed position of the cock, of a valve for closing said vent port in the open 105 position of the cock and adapted to be opened by the movement of the cock to its closed position.

2. The combination with a train. pipe, of an angle cock comprising acock key having a port for establishing communication through the train pipe, a handle for operating said key, and a valve operated by the movement of the handle to the position for closing said port for opening a vent port from the train pipe through the cock key. 3. The combination with a train pipe, of

an angle cock comprising a cock key forv controlling communication through the train pipe and a vent port for "enting fluid from 10 the train pipe, a valve, and a handle for operating said cock key and having a cam for opening said valve upon movement of the handle and the cock key to the closed position.

In testi my hand.

mony whereof I have hereunto set CLYDE C. FARMER. 

